Vulnerability-Lookup

CNVD-2018-26908

Vulnerability from cnvd - Published: 2018-12-27

Title

Linux kernel越界访问漏洞（CNVD-2018-26908）

Description

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel中的BPF verifier存在安全漏洞，该漏洞源于程序未能正确的计算数值的边界。攻击者可利用该漏洞造成越边界内存访问。

Severity

高

Patch Name

Linux kernel越界访问漏洞（CNVD-2018-26908）的补丁

Patch Description

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。 Linux kernel中的BPF verifier存在安全漏洞，该漏洞源于程序未能正确的计算数值的边界。攻击者可利用该漏洞造成越边界内存访问。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b799207e1e1816b09e7a5920fbb2d5fcf6edd681

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b799207e1e1816b09e7a5920fbb2d5fcf6edd681

Impacted products

Name
['Linux Kernel 4.14.', 'Linux Kernel 4.15.', 'Linux Kernel 4.16.', 'Linux Kernel 4.17.', 'Linux Kernel 4.18.*，<4.18.13']

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-18445",
      "cveUrl": "http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18445"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u4e2d\u7684BPF verifier\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u7684\u8ba1\u7b97\u6570\u503c\u7684\u8fb9\u754c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u8d8a\u8fb9\u754c\u5185\u5b58\u8bbf\u95ee\u3002",
  "discovererName": "unknown",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b799207e1e1816b09e7a5920fbb2d5fcf6edd681",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-26908",
  "openTime": "2018-12-27",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u4e2d\u7684BPF verifier\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u7684\u8ba1\u7b97\u6570\u503c\u7684\u8fb9\u754c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u8d8a\u8fb9\u754c\u5185\u5b58\u8bbf\u95ee\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel\u8d8a\u754c\u8bbf\u95ee\u6f0f\u6d1e\uff08CNVD-2018-26908\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Linux Kernel 4.14.*",
      "Linux Kernel 4.15.*",
      "Linux Kernel 4.16.*",
      "Linux Kernel 4.17.*",
      "Linux Kernel 4.18.*\uff0c\u003c4.18.13"
    ]
  },
  "referenceLink": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b799207e1e1816b09e7a5920fbb2d5fcf6edd681",
  "serverity": "\u9ad8",
  "submitTime": "2018-10-19",
  "title": "Linux kernel\u8d8a\u754c\u8bbf\u95ee\u6f0f\u6d1e\uff08CNVD-2018-26908\uff09"
}

CVE-2018-18445 (GCVE-0-2018-18445)

Vulnerability from cvelistv5 – Published: 2018-10-17 19:00 – Updated: 2024-08-05 11:08

Summary

In the Linux kernel 4.14.x, 4.15.x, 4.16.x, 4.17.x, and 4.18.x before 4.18.13, faulty computation of numeric bounds in the BPF verifier permits out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandles 32-bit right shifts.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

13 references

URL	Tags
https://cdn.kernel.org/pub/linux/kernel/v4.x/Chan…	x_refsource_MISC
https://usn.ubuntu.com/3847-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3835-1/	vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:0512	vendor-advisoryx_refsource_REDHAT
https://usn.ubuntu.com/3847-2/	vendor-advisoryx_refsource_UBUNTU
https://cdn.kernel.org/pub/linux/kernel/v4.x/Chan…	x_refsource_MISC
https://usn.ubuntu.com/3832-1/	vendor-advisoryx_refsource_UBUNTU
https://github.com/torvalds/linux/commit/b799207e…	x_refsource_MISC
https://usn.ubuntu.com/3847-3/	vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:0514	vendor-advisoryx_refsource_REDHAT
https://bugs.chromium.org/p/project-zero/issues/d…	x_refsource_MISC
http://git.kernel.org/cgit/linux/kernel/git/torva…	x_refsource_MISC
https://support.f5.com/csp/article/K38456756	x_refsource_CONFIRM

Date Public

2018-10-17 00:00

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.